How to get cursor on chart to display time instead of date

Below i have a sample of my data, code and the chart i plotted. I need to be able to see precisely what time it is when i place my cursor on a spot on the chart. However it is just displaying the date on the bottom right next to "x =".

Also how are the grid lines on the chart placed? I would like them to all be spaced with the same amount of time between each one.